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R. W. SCOTT.

DEVICE FOR MACHINE KNITTING WITH AUXILIARY-YARNS.

APPLICATION FILED HAY 20. i920\ 1,370,490, Patented Mar. 1, 1921.

2 SHEETS-sugar 1- R. W. SCOTT.

DEVICE FOR MACHINE KNITTING WITH AUXILIARY YARNS.

APPLlc/Irlou FILED uAY2o,1s2o.

1,370,490. Pated Mar. 1,1921.

2 SHEETS-SHEET 2.

ROBERT 7 SCOTT,k OF BABYLON, lNEW YORK.

DEVICE FOR MACHINE-KNITTING WITH AUXILIARY YARNS.

Specification of Letters Patent.

atented Mar. 1, 1921.

Application filed May 20, 1920. Serial No. 382,961.

To rollio/1.0m it may cof/tc fm Be it known that l, ROBERT NV. SCOTT, acitizen of the United States of America, and resident of Babylon, in thecounty of Suffolk and ifi-tate of New York, have invented new and useful lmprovements in Devices for Machine- Knitting with Auxiliary Yarns,of which the folloWingi is a specification.

'lhis invention relates to devices for making; thickened Walestructures, such as mock seams, iny knit articles. such as hosiery orWelted hosiery, f.

i' have heretoforeshown and described in my United States Patent No.1,256,834, dated Feb. 19, 1918, an article of hosiery having athickened-Wale or mock-seam and a method of making the same. A preferredinstrument for the manufactureof such fabrics is more vfully shown,described and claimed in my application for United States Pat-ent Ser.`

No. 114,096, filed August 10, 1916. As explained in my said Patent No.1,256,834, a desirable machine for the manufacture may conform in themain to the machine shown, described andy claimed in my Letters PatentNo. 1,282,958, dated (lc-t. 29, 1918, in connection With which the mainand splicing' yarn feeding means illustrated in my Patent No.1,256,062-, Feb. 12, 1918 may be employed with advantage.

.ln any use of mechanism for the manufacture of inturned Welts ontubular knit articles the operation involves the taking and holdinp ofbights or loops near the beginning.; edgfe of the vWelt during theknitting fabric for the Welt, and the subsequent trans fer to theneedles for knitting` ther body of the article of the taken or heldloops.

Then it is sought to make the thickened- Wale or mock-seam of my PatentNo. 1,256,831, above, on a machine having any type of device forproviding,` an automatically-made uniting,- course for an inturned Welt,the operation of the mock-seam or thickenedavale device may be seriouslyinterfered With bythe Weltholding and retransferring means, or by theyarn feeding devices, or by other causes. For instance, in the operationof my machine of Patent No. 1,282,958 above, it sometimes happens thatby reason of a mispositioned knitting needle,

a bent or Vdeformed transfer bit' or other` causes, a bight intended forthe uniting course and taken by the transferbits at the proper time isnot transferred to the needles at ythe later time intended, but remainsengaged With the transfer bit; or it happens that through breakage orexchange of `yarn an end of yarn from somewhere Within the Welt fabricor from a previous article may extend up past the edge of the transferdial carrying the bits. rl`here Will result a run or runs of yarncrossingthe normal free space between the knitting needles relied uponto knit the body of the fabric and the transfer dial. The'presenceofsuch a yarn is not detrimental to the manufacture of the stockingproper, since the strain of the growing fabric Will either rupture theyarn or release it or pull out the end of the yarn, and no harm is done.But When the manufacture includes a mock-seam or thickened-Wale madeaccording to the method of my Patent No. 1,256,834, the presence Of'sucha yarn Or other obstruction Within and above the operating' set ofknitting; needles may result in detaining long bights of the thickenedauX iliary yarn Within the needle cylinder, and

preventing proper formation of the thick? ened Wale.

A principal object of the 'present invention is to enable themanufacture Of thickened Wale stockings or other articles on machineshaving' auxiliaryk appliances, such as inturned Welting mechanism, insuch a manner as to insure the proper operation of the thickening Walemechanism.

ln the accompanyingy drawings- Figure l is a left side elevation partlyin.

neath the dial Of misplaced loops, threads or other obstructions;

F ig. 4 is a similar detail illustrating the positions of the parts;

Fig; 5 is an explanatory detail enlarged,

till

showing one of the transfer instruments, the needles, a web holder, anda part of the latch ring;

Figs. 6, 7 and S are diagram plans illustrating different positions ofan instrument hereinafter referred to;

Fig. 9 is a diagram plan illustir-tinpl the improper detention of athickening Wale yarn by an obstruction at the verge oi: the dial; and

Fig. 10 is a section drawn to an enlarged scale on the line 1()-10 oiFig. (3.

lVhile the mechanism referred to above as mechanism auxiliary to thedevices for torming the thickening ale for making! a 'fabric having aWelt may be of any ty pe, in this instance, I have shown mechanism suchillustrated in my Letters Patent No. 1,282,958. The devices include adial. 4 ro tatable in unison with the motions ot a needle cylinder 260,the Web holder bed 295, web holders w and needles 11,. by gearing g', Inthe normal operation of the machine the needles n are first Worked tomake a, beginningr selvage from a yarn or yarns fed to them from one ofthe yarn feed fingers F, and the transfer implements T carried by thedial 4 are subsequently projected over the heads of depressed needles aand above the web holders w corresponding to the in struments T soprojected. to take bights ot a unitingr course and retire with themtoward the verge of the dial 4.

The needles n Fig. 5, depressed tor this purpose may recur as frequentlyas desired among the others, for instance, they may be every second,fourth or sixth needle.

The machine now operates to knitwthe fabric for the Welt lV. ln order tosecure the entrance of this fabric in a told A\v'tiiin the needles andunder the dial, it is generally necessary to provide an instrumentadapted to enter the space between the re spective verges of the needlecylinder and the instrument dial 4 (or its equivalent transferinstrument carrier). In my said Patent No, 1,282,958, an appropriateinst 'nment tor this purpose is shown in Figs. 2, 3 and' 21, comprisinga presser P, pivoted (see Fig. 3) at p and adapted to be swung,r on itspi rot to pass above the web holders and beneath the instrument dialand. beneath. the latch ring' 550, and thus to rest upon the fabricdetained at one edge on the instruments T and then in course of increaseby t ie operati of the needles. The place otentry ot the Working end p2of the instrument P is ar'- ranged in respect to the needle 'Wave in theWorking needles so as to pass above de pressed needles only. Usually theinward end of the instrument P is bent down. ln sertion of theinstrument P is by an automatic connection from a cam on a patternsurface 120, such as thrust bar 463 Working' a rocker p in turncontrollingr a Wire link p3 hooked at one end into a hole in the instrument P and driven inward by a compression spring p* against whichthe rocker p6 takes.

'As shown in my Letters Patent No. 1,270,064, dated June 18, 1918, thenecessary presence ot' the end p2 ot' the instrument P .in the spacebetvveen the verge of the needle cylinder and the dial enables it to beemployed as the detector or actuator of an alarm device or stop motion.The leading face fz/ of the portion of the blade P which extends Withinthe circle ot needles is now made straight and so arranged as to torm avery high angle to the line oi the advance ot the needles, owing to thepoint at which blade P is pivoted when the blade is enteredy to theposition shown in Fig. 8, and in practice a connection 40 serving eitheras the striker for an alarm bell B or to actuate a stop -Inotion isattached. to the pivoted blade P, so that when a needle is broken andleft in an elevated position, contact with the leading' face of theblade serves to throw it outwardly more or less violently and eitherrings the bell or stops the machine, or both. The connection 4l) may bea spring Wire carryingr a striker 41; the bell B is preferably as shownin Figs. 6 and 7 positioned to spring the Wire 4.-() when the end p2 ofblade p is within the needles.

For purposes about to be explained the automatic device controlling theconnection i463 may be so arranged as to enter the instrument a party'ay into the place occupied by it for making the weId W after the WeltW has been completed and after the instrument P has been Withdrawn atthc completion of the Welt. The last operation in .making the weltcomprises the projection el. the instruments T to and beyond theposition shown in Fig. 5 to enable the 'trans 'ler oi the detainedbight-s held on the instru. ments T to the needles a; the reentrypresser P may immediately follow the sage by it of the last loop oi" theseries transferred. By reason ot defective needles, de- Vl"ective bitsT, or defective motions of either ot these parts, a loop a', may be heldup and. not transferred, :is indicated in Fig. 25.

Referring non' to Fig'. l, the machine is 'there shinvn equipped vriththe means ol? my application Serial No. 114.096, comprisingr theauxiliary varn guide 1 for the thickeninn' ivale yarn t andv withautomatic means comprising a. connection t5 to one ot thepattcrn-operated thrust bars L16() for drop ping' the varn guide t tooperative position to ivra p the Warn around a ,e'roup of needles aiisolated at the right hand side ot Fig. 1 by being: permitted to remainabove their telloivs.

Unless the loop a; is disposed of in some 'xv-a y the yarn t cannot beWithdrawn through the guide by its take-up means to lie them.

`smoothly against the back of the narrow group of needles n4. To permitthis the yarn t must be drawn off across the diameter ofthe needlecircle in the position of an increasing chord (see the position t4 Fig.y9)

until it defines a diameter, and then must be recovered through theguide t during its passage through the position of decreasing chords(see t3) until the needles n* are oncev more, opposite the guide t. Butif in any way the space between the dial and the tops of the needles ais obstructed, this motion cannot take place. A yarn loop such as theloop a@ is such an obstruction; as shown in F1'g.,9, such a loop mayhold a run t lof the yarn t and prevent itssweep through or recoveryduring any of the positions represented by the line t3.

i single run ofyarn in the Vposition of the loop mayl alsoconstitutesuch an obstruction. rThis may and often does occur in theoperation of the machine by the trailing end of somefyarn hanging downfrom the yarn clamps 7 of the machine. This end may be either a loosepiece of yarn or a misplaced end of one of the yarns carried by theingers F. y n

Referring now to Figs. 6 to 8 and Fig. 10,

l have provided the instrument P with ya surfaceg/ which inthe positionof inward lZhi-ust of the instrument P lies at a slifht angle to theradius of the needle circle. d3y reason of the position of the pivot pthis surface is still capable of performing the function of moving theinstrument P outward sharply when struck by a misplaced needle, Fig. 6.e

Y prefer to sharpen the leading face of the blade P for the purpose of.parting the loop or ends of yarn, althoughit should be understood thateven when not so sharpened thc ystrain imposed -on such ends or loops ofyarn may be depended on to break or tear If. the leadino' face of bladeP were sharpened to a linife edge, the first broken needle thatencountered it would tend to dull this edge; have therefore overcome hisdifficulty by making the edge square or sii se as to 'f'.riu a sharpedge at the upper surface of the leading edge of blade l When thussharpened tl e contact of a broken needle does 'not in any way interferewith the cutting edge. The sharpened edge y should not extend inwardfarther t ian the point ky2, Figs; 6 and 8, in order to leave a roundsmooth surface at the point p2 to permit it to act as a presser toinwardly dispose the lwelt fabric W.

The operation of the devices will now be understood immediately afterthe completion of the welt QV by the transfer of the last withheld bightfrom the bits T, presser shown in Fig. 2 and in Fi. 7, by proper ghtlyunder-cut as shown at 3/ in Fig. l0,

Tf any such loop as the loop x, or a piece of loose yarn, or any otherobstruction now occupies the space between the verge of the dial 4 andthe heads of the needles, the edge '1/ encounters and severs it. Sincethis kobstruction in the nature of 'the case can only be a loop of thebreakable uniting course, or a .vaste run or loop of yarn, damage to thefabric is prevented, and the space between the verge of the dial and theheads of the needles is left kopen :for the subsequent operation of theguide t to lay the thickening yarn t properly. ihen Ithe presser P isall. the way in, the striker 41 is in contact with the edge ol'bell Bandthrough the agency of mechanism 4GB, f2@ 4 which moves sistance todeflection by the held-up yarns or bights by this means, in addition tothe effect of the higher angle of its leading edge y.

Iny order that the strain of severing such a loopy shall .not interferewith the propei` Withdrawn position desired for the bits T duringknitting for 'the remainder of the article, a preferred procedure is topermit the means for projecting the bits T to their outward transferposition and for withdrawing. them to their idle position to contin nein action for several courses after the insertion tospace-clearing.position of the presser P. 'This has no effect ontheknitting, but insures that the bits T remain in their withdrawnposition, whether or not one or more of kthem have been pulled out bysevering loops carried by them. The presser l. may remain in theposition of Fig. T untilr the heel or toe kntting to take place.

I claim: n

l. A knitting machine having therein in combination, auxiliary yarnydelivery means adapted to cooperate with certain needles only, andyarnparting means adapted to clear misplaced yarns from the path sweptby the auxiliary yarn.

2. A knitting machine having therein needles, means `for actuating themand means for feeding yarn to them, in combination 'with means Vfordelivering an auxiliary yarn from a position causing it to float `behindthe needles, and yarn parting means adapted to clear the space behindthe needles of misplaced yarn for the free passage of the auxiliaryyai'n iioats.

y 3. A knitting machine having therein neet dles, and means foractuating them, yarnholding means above and behind the needles, andyarn-delivering means for an anxiliary yarn adapted to deliver its yarnto and float it behind certain olf the needles respectively, incombination with means operating above and behind the needle.; andbetween thel fabric and said yarirholding means to part misplaced yarnsfrom attachment to the `fabric and thereby to clear a. path for thetloats oit auxiliary yarn.

4. An automatic knitting machine having therein in combination,auxiliary yarn-delivery means adapted at certain times to cooperate withcertain needles only to make thickened-Wale structures, movableyarnparting means adapted to clear misplaced yarns from the path sweptby the auxiliary yarn, and means ,tor moving said parting means tooperative position cordinately with the operation oi." the auxiliaryyarn-dcliveryv means.

A circular knitting machine having therein needles and means foractuating them, ;\'arn-holding means above and within the needles, andmeans for delivering an auxiliary yarn in relation to the needles tomake thickened-Wale structures, in combination with means adapted to bemoved into the space between said yarn-holding means and said needles toclear said space of obstructing misplaced yarns for 'the free passage ofthe auxiliary yarn.

6. A circular knitting machine having therein needles and means foractuating `them, means for making inturned we ts,

means for making thickenedavale struetures by the addition of anauxiliary yarn, and means acting aiter the completion of the welt forclearing a space behind the needles of obstructing yarns to insure freepassage of the thickening-Wale yarn.

7. A knitting machine of the kind having therein means for withholdingwithin a circle of needles bights of yarn for the uniting course ot anintnrned welt, and having therein means actuated to feed a thickeningwale auxiliary yarn to certain needles only after the welt-formingoperation, in combination with means for sweeping the space between theneedles and the bight-withholding devices clear of obstructing yarnsacting prior to the passage therethrough of a float o't the auxiliaryyarn, and after the completion of the welt.

8. A knitting machine having therein means for automatically producingfabrics with inturned welts including a presser for entering theinturned fold of the welt during making, said presser having ayarn-severing portion, in combination with means tor positioning thepresser after the completion of a welt to bring its severing edge incontact with misplaced runs of yarn.

9. In a knitting machine, the combination oit a welt presser having asevering edge, means for forming an inturned welt by means including thepresser, and means Vfor p i sitioning the presser after the formation ofthe welt to cause its severing edge to sweep the region behind theneedles of obstructing yarn attached to the fabric.

ll). ln a knitting machine the combina.- tion of the needles and bightdetaining inc-ans for forming a welt, with a presser for the welt fabrichaving a severing edge, a connection adapted to be operated by thepresser when struck by a misplaced needle to actuate an alarm or stopdevice, and yielding means to position the presser after use tor weltingto bring said edge into the path of misplaced needles and misplacedyarns to be operated by such needles and to sever the yarns,respectively.

1l. A knitting machine having therein, in combination means fordelivering an auxiliary yarn at predetermined times in the production ofthe fabric, a device for parting above and behind the fabric a mis#yplaced or obstructing yarn attached to the ltabl-ic and likely toprevent the proper operation of the auxiliary yarn-delivering means, andmeans for positioning the parting means cordinately with the operationoi the said delivering means.

l2. A, presser, yarn-severing and detector device `tor use in knittingmachines comprising a pivoted instrument having a free end iulapted toride on and inwardly press a tord ot the fabric, said structure havingan edge lying crosswise of the direction 0f motion of the needles andfabric near the needlcs sharpened at its juncture with one face of thestructure, and thereby adapted both to sever misplaced yarn and towithstand the blows of misplaced needles without substantial damage tothe severing edge, in combination with yielding means for forcing saidinstrument inwardly during welting and for positioning the part of saidinstrument bearing said edge in line with the needles during subsequentknitting, and a connection for operation by the instrument when it isstruck by a misplaced needle.

Signed by me at New York, N. Y., this 18th day of May, 1920.

ROBERT W. SCOTT.

